Electric sign



Pafefe \fov, 21, 1922.

pp11catio 111ed. Decebe 1, 1921. serial o. 519,0.

Be it 1I1oTvn that I, KTHBRIE LIIPRT, I citiZen of the T;nited StateS, feSiding of e 1 ork, in the count of xeW Tork and State of Xev 1 ork, have invented certain neT and l1Sef111 In1 TovenlentS in 1lectric Signs, of Tvhich the fol1oving iS a S eci CatiOn.

1Iy inventioI1'TelateS to electfio SignS and other soch illllII1inated diS lays. 1 aiI1 to Inake the Sign II10St effective in illun1ination flexible in design and adaptability to nleet varying TequiTen1entS and conditionS of I1Se eaSy and inex enSive to II1aI111foCtllre, in- Sta11, and adjoSt and in Service convenient and econoInical aS regardS both operation and II1aintenance. Sti11 other advantages obtainable through the invention Tvill a ear froI11 In deScription hereinafter of the beSt eInbodiInents of the invention knofvn to Ine.

The invention iS applicable f'ith Special advantage to the geneTal type of Sign fepreSented b nited StateS 1 afent 1o. 1,38,816 granted to 41. S, IJiII1 )ert, ^1I1guS 3rd, 1920 nOther ty e of apparatuS eIn bodying soIne of the nnderlying )rinci )leS of Iny pTeSent ap 1ioation iS liSC10Sed in IIly CoIn anion a licotion, Serlal X0. 519,0 filed 1)eceII1beT 1, 1921, ooncllrrently here Tvith.

1n the dTaWingS, Fig. 1 is a front ieW or eleTation of an i11l11iI1ted Sign a porotuS Conveniently elnbodying n1y inveT1tiof1.

Eig. 2 iS ffago1entary diagTammatic Side ieTv of light So11Toe Tvith seTeTal re fiective deviceS oI' I1nitS,about CoTroS ond ing to a SeCtion taken aS indicated by the line 22 in ig. 1, bllt on a larger Soa1e iHnS trating the operation and advantogeS of I11 invention.

Fig. 3 iS lan vieTv of one of the feHective illuIninating deviceS oI llnitS Shovvn in igS. 1 and 2, on o lafger sca1e.

ig. ShovS a Inid-Section through Such o unit, taken aS indicatedby the line in Fig. 3.

Fi 5 iS a front view of a Si n of fhe on lan1 ty e converted into a Teflectively illllIninated sign i11 aooordance vith oly iI1- vention.

ig. 6 iS a n1i(1-Sectiona1 viev, SiII1ilor to ig. 5, i11I1StI'1ting a Tef1ective i111II1iIlo,t-iIlg device of unit speoially adapted fof snoh convefsotions aS i1111Strated in ig. 5-..

Fig. 7 is o fTont ew i11nStToting the ap dicu1aT 01' nofn1al to the group.

plication of Iny invention to Sign of.the S0-called roof tyPe.

The Sign Shown in EigS. 1 and 2 con1 riSeS ground oI' face plate 11 carrying the de Sired oeSign,in the feSent inStance, the lettel I,-in colorS visible by (1ay. Tho electric lam or lan1ps 12, 12 hefe ShoWn aS SoI1I'ce of light foI' the sign at night are n1ounted in Suitably located SocketS 13 attached to the face plate 11. In Fig. 1, theSe SoCketS 13 afe centrally Situated in the n1idSt of the I1I1illuII1iIlated background of the let tef, in the u per and loTveI' cnS S of the II and the laII1I)s 12, 12 are covered oT Ten deTed o aqne on theiI' endS by n1eanS of Caps 1, So as to be theInSelveS Practically inviSible to an obSeTver, ^Lt night, the Sign design iS1uI1inoI1Sly Set oI1t or outlined by light fToII1 the laIIlI)s 12, 12 refleoted forTvard fron1 ref1ective deviceS oI' 11nitS 15 Suitably n1ounted and arranged on the face plate 11. Since none of the direot rayS of the actuating laII1 )s 12, 12 1I'e viSible to an obServeT, ea-ch of the deviceS 15 haS alInost the exact Sen1blance of on electric 1a I1 and at soIIle Shoft diStanCe avay, it iS iII1 )oSSible fo tell the difference- Referrin nov, to FigS. 3 ond aS Well aS FigS. 1 and 2, it Wi11 be Seen that the individllal reflective device 15 coIn riseS a. SeTieS of gfouP of sonleTvhat S1af1ike Tef1eCtor e1e nentS 20 afranged to fef1ect tho ob1iqI1e1 incident 1ight (CoIning directl fron1 the correS onding lalI1 12) apprOXinlately perpen S ShoTvn, theSe TeffectoI' eleDentS 20 aIe arranged fo extend Side by Side in the SaIne general (1ireC fion ShI1tter-viSe, in a ooInIIlon genera1 plane in front of bnt ap roXin1ating that of the face late 11 as o TvhoIe, at one Side of oI' behind the 1ight Soufce 12. The eleInentS 20 Ina-ke vith their coTnolon ge nera1 lone Such coInInon angle that the light of the SoI1rce 12 directly inoident l1 on theIn froIn in ffont iS ref1ected and thfovn foTvaTd. Ordinarily, T iI i1fion in the diStance of fho- Tef1ector unit 15 fron1 the lamp 12 (either in the Same of in diefent SignS) W not be so great aS to reqnire on adinSfable Shot ter-1ike Inounting of the elen1ents 20, of even the rovision of a liIle of onitS vifh fhe elenlents 20 Set at varionS (ierent fiKod angleS. 0I1 the contTaTy, one Standord 11I11t, Wh a gronp of Set of reectoI' e1enentS 20 fixed at one oniverSa1 ang1e, vi11 be found 

